This is in an addon format, so extract to addons.What's new?Changelog:1.3+ Added a Quick-Hitting function! You can also turn it on/off by typing quickkick into console (you have to be an admin). Press and hold your USE key and press your SECONDARY ATTACK key to Quick-Kick!/\ Fixed a bug which gave you 24 pistol ammo on spawn/\ Fixed a bug which showed some weird ammo indicatorFP Thread:http://www.facepunch.com/showthread.php?t=611712YouTube Video:http://www.youtube.com/watch?v=Cetp9Nl25vo

This download looks like an addon. You need to extract the downloaded zip and put the addon folder in your Garry's Mod addons folder. You should end up with a directory structure similar to below: